A modified reference to Liu kang's bicycle kick from mortal combat. A sexual bicycle kick is when a female(most commonly but can be reversible with both sexes) is riding the dick when the male is flat on their back and the female does a bicycle kick and gets that dick up in some more
When you decide to play Mortal Kombat and some asshole picks Liu Kang just for the sake of the one move that this person mastered and will proceed to bend you over and fuck you no matter what character you choose. This bullshit move is called the bicycle kick.